footer {
  color: #333;
  width: 100%;
  height: 1.5rem;
  font-size: 0.5rem;
  text-align: center;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  background-color: #f0f0f0;
  box-shadow: 23px 14px 23px 20px rgba(203, 193, 187, 0.5);
}

.footer-menu {
  flex: 1;
  vertical-align: middle;
}

.footer-box {
  outline: none;
  height: 1.5rem;
  display: flex;
  flex-direction: column;
}

.footer-box i {
  height: 1rem;
  line-height: 1rem;
  font-size: 0.7rem;
}

.footer-box span {
  height: 0.5rem;
  line-height: 0.5rem;
  font-size: 12px;
}

.btn-active {
  color: #3f51b5;
}

.btn-default {
  color: inherit;
}
